The right finish for your leather / Ivo Knoll in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXV (Année 1990)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXV (Année 1990) . - p. 150-155 Titre : The right finish for your leather Type de document : texte imprimé Auteurs : Ivo Knoll, Auteur Année de publication : 1990 Article en page(s) : p. 150-155 Note générale : Bibliogr. Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : The right finish for your leather is a topic which determines our daily efforts from a developmental, as well as a service point of view. I would like to share some of my thoughts on this subject with you. Is it stil] possible to look upon finishing, as it was years ago described in a promotional leaflet by the New England Tanners Club ? "The finishing department in a tannery is the area where an alert and creative mind now adds the final touches to enhance the natural beauty of the product, while further adding to its "service-ability". Up until World War One, natural and tu a greater extent synthetic dyestuffs were the major colouring agents on leather. Aniline dyestuffs could not be imported during wartime; for this reason some finish producers found a way to colour leather with the aid of pigments. In order to fix the pigments on leather they were ground with viscous solutions of casein in cone mills. With the application of this type of "pigment paint" the leather producers discovered that leathers with uneven or patchy surfaces came out almost as good as those of better selections. The better utilization of poorer quality raw materials made leather production more profitable. The description of the above event was not the beginning of leather finishing but it steered it into the direction as we know finishing today. In 1931 BASF started manufacturing and selling polyacrylate dispersions for the purpose of leather finishing, and soon after — as other companies followed this example — a new era in leather finishing dawned. For the first time highly stretchy glove leathers could be finished with these resilient binders. Over the years leather finishing has become a very complex field indeed; few other coatings have to meet so many requirements. En ligne : https://drive.google.com/file/d/1gD3mtDwEc0EdTFnRFBTRkbeVuDj6Cp1y/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8627 [article]

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Waterborne coatings based on different film forming polymers / Dietrich Lach in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. LXXXIII (Année 1988)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. LXXXIII (Année 1988) . - p. 87-94 Titre : Waterborne coatings based on different film forming polymers Type de document : texte imprimé Auteurs : Dietrich Lach, Auteur ; Karl Fischer, Auteur ; Ivo Knoll, Auteur Année de publication : 1988 Article en page(s) : p. 87-94 Langues : Américain (ame) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : For about 20 years, the problems of environmental protection have been intensively discussed at the congresses of the leather industry in all parts of the world. In the seventies, the effluent problems were of topical interest. In the heighties, the discussions have concentrated more and more on subjects concerning air pollution. The problems of environmental protection have thus shifted from the beamhouse to the finishing department. Requirements of the government agencies are,to a great extent, already in existence. Enforcement of these regulations will make the use of lacquers based on oganic solvent difficult in the future. This means that the traditional finishing system has to be changed completely. Waterborne coatings have therefore to be used for finishing and top coating leather. However, the question is whether this will be possible without impairing the physical properties and the appearance of the finished leather. Before we discuss this question, let us first take a look at the improvements we can achieve with existing technology. Let us consider a tannery finishing 2000 sides a day using two top coats based on nitrocellulose. These top coats can be applied to the leather in four different ways. They can be sprayed or printed as a nitrocellulose lacquer or they can be sprayed or printed as a lacquer emulsion. Table I shows the approximated amounts of solvents emitted. En ligne : https://drive.google.com/file/d/1WXdsQbn9fi4T8LAzh9MlsKftJEp-5T5D/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=8846 [article]

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